Enhanced AACPlus (AACPlus v2) Codec

[bsiegel]

Re: Enhanced AACPlus (AACPlus v2) Codec

I've got to mess around with the settings some more. I'm not entirely sure why it's cutting out for that segment of desired output rates. Even if I copy the tuning settings from another bitrate segment that's known to work, it still can't encode in that one specific segment. I'm going to try rolling back the hack I made to add higher bitrates and see what that does, because, even if I doubt that has any relationship or effect on the problem, I can't imagine the original codec having this problem. I'll keep at it and post here when I've got the problem nailed.

--Brandon Siegel

[bsiegel]

Re: Enhanced AACPlus (AACPlus v2) Codec

Well, I put off studying a bit and played with the code, trying to see what part of the tuning table was breaking the encoder, and it took me a while to realise that from 16kbps to 36kbps, the encoder activates SBR (spectral band replication) to boost the quality of the encoding, but this causes it to use tuning data from the mono tuning table. Above 36kbps, it uses data from the stereo tuning table. Anyhow, the link's been updated in the first post - go grab it.

--Brandon Siegel

[irwin]

Re: Enhanced AACPlus (AACPlus v2) Codec

hi
i test this encoder and:
- aacplus v2 works (in stereo) only 18000-27999 bs
- between 28000-36000 encoder don't work at all
- above this aacplus work BUT only V1 mode (no Parametric Stereo)

Why?
is possible for example 32000 or 40000 with v2 (parametric stero)

[irwin]

Re: Enhanced AACPlus (AACPlus v2) Codec

i test 1.2 version - it's ok now!
Thnaks for this encoder!

[mariusziwan]

Re: Enhanced AACPlus (AACPlus v2) Codec

Thanks bsiegel for this encoder and one question. In test version 1.3 be a VBR mode ? :D

[ckjnigel]

Re: Enhanced AACPlus (AACPlus v2) Codec

Foobar 0.9 plays my bsiegel encoded files just fine.
I think this format is the shiznit for playing in Beta Player on Pocket PC.

[AlJ]

Re: Enhanced AACPlus (AACPlus v2) Codec

Great work!

Al

[sean_malice]

Realplayer 10 plays the .3gp files

Realplayer 10 plays the .3gp files fine with full SBR support.

http://www.real.com

Real is very comitted to AAC+ anyway

https://www.helixcommunity.org

The free tools available there alow for live He-AAC streaming as low as 32kbps without Parametric stereo support yet i believe, inside a .ra container.

Quicktime 7 on macs plays the .3gp files but without the SBR information.
Having good H.264 video without He-AAC support really sucks. Typical... :thumbdown

[hurry]

Re: Enhanced AACPlus (AACPlus v2) Codec

Hello to all! Sorry I am visiting the dbpoweramp website for the first time in search of the aacplus v2 encoder. I have downloaded the encoder by Brandon. Can anyone kindly explain me how to install it and make it work? Which dbpoweramp software should I download and how do I add this encoder to it? Will it encode from mp3 to aacplus v2? Thanks in advance for your kind help. :smile2:

[dand]

Re: Enhanced AACPlus (AACPlus v2) Codec

Well, I put off studying a bit and played with the code, trying to see what part of the tuning table was breaking the encoder, and it took me a while to realise that from 16kbps to 36kbps, the encoder activates SBR (spectral band replication) to boost the quality of the encoding, but this causes it to use tuning data from the mono tuning table. Above 36kbps, it uses data from the stereo tuning table. Anyhow, the link's been updated in the first post - go grab it.
--Brandon Siegel

How did you figure out which settings to use for 44100 Hz audio at different bitrates?
Thanks,
Daniel

[bsiegel]

Re: Enhanced AACPlus (AACPlus v2) Codec

Releasing a new version based on the 630 codebase that is provided at the 3gpp website. Adds a 10kbit/sec mono encoding mode and makes general encoding improvements all around. Please replace your current version with the one linked in the first post of this topic.

Also, the code for this is open so if someone wants to go ahead and make a linux build or whatnot, the instructions are also in the first post.

--Brandon Siegel

[dimzon]

Re: Enhanced AACPlus (AACPlus v2) Codec

This encoder produce MPEG4 AAC+ wrapped into 3gp (very-very close to mp4) container!

c:\dvdrip\mp4box\mp4box.exe -info test.3gp
* Movie Info *
        Timescale 600 - Duration 00:05:36.468
        Fragmented File no - 1 track(s)
        File Brand 3gp4 - version 0

File has root IOD
Scene PL 0xff - Graphics PL 0xff - OD PL 0xff
Visual PL: No visual capability required (0xff)
Audio PL: High Quality Audio Profile @ Level 2 (0x0f)
No streams included in root OD

Track # 1 Info - TrackID 1 - TimeScale 48000 - Duration 00:05:36.469
Media Info: Language "und" - Type "soun" - Sub Type "mp4a" - 7886 samples
MPEG-4 Config: Audio Stream - ObjectTypeIndication 0x40
MPEG-4 Audio SBR - 2 Channel(s) - SampleRate 24000 - SBR SampleRate 48000
Self-synchronized

so best matching extension is m4a or mp4 (not aac)

[bsiegel]

Re: Enhanced AACPlus (AACPlus v2) Codec

This encoder produce MPEG4 AAC+ wrapped into 3gp (very-very close to mp4) container! So best matching extension is m4a or mp4 (not aac)

True, in fact changing the extension to .aac will cause it _not_ to play in a number of players. That's why the plugin is configured to output files with a .mp4 extension. It's been that way since version 1.2 I believe but don't quote me on that. The actual 'proper' extension is .3gp but this is so uncommon as to make it almost useless and it's not significantly different from mp4.

Thanks for the output of that program - very interesting.

--Brandon Siegel

[dimzon]

Re: Enhanced AACPlus (AACPlus v2) Codec

look @ my cli wrapper for enc_aacplus.dll from winamp 5.1

http://s51.yousendit.com/d.aspx?id=1T303I215G94R18L1ZB46SMIAB

[Catrio]

Re: Playing the aacPlus files in Winamp 5

Hi to everyone, Winamp is not capable for playing AAC files whit the `Plus´ enhancements because the files created for this codec be inside the MP4 container, and Winamp only play raw aacPlus files because the Winamp´s MP4 demuxer block the improve information, you must extract the aac raw data from the files created whit the dbpoweramp MP4 to AAC converter and
the extension file must be `aac´or `apl´.

Test it